Tube-number record
CK7571/QK685
0 archive entries
CK7571/QK685 is a tube type in the TubeDatabase archive (class: Recording Storage Tube). Recorded specifications: construction Tetrode, socket Duodecal, and maximum plate voltage 5000 V. The archive does not yet hold a photographed example of this type.
ClassRecording Storage Tube
BaseDuodecal
Filament6.3 V @ 600 mA
Construction
Primary TypeTetrode
EnvelopeGlass
SectionsSingle
Filament / Heater
Heater Notes6.3V +/- 10%
Absolute Maximum Ratings
Plate Voltage5000 V
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Read | 3500 V | — | — | — | 0.005 mA |
| Prime | 3500 V | — | — | — | 0.025 mA |
| Erase | 3500 V | — | — | — | 0.05 mA |
Application Notes
Requires four operations: prime, write, read and erase. Capable of storing information for many hours and reading up to 20,000 times.
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